The Bright Solutions Universal Coolant Dye can be used in regular, green glycol as well as all colors of extended-life coolants. The universal dye can reduce shop inventory and eliminate the possibility of misdiagnosis of contaminated coolant because the dye will not distort color. A 1/4 oz of the super-concentrated formula is required per vehicle. The OEM-approved dye is available in 8 oz self-measure bottles and 1/4 oz bottles.